/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  background: #f4f6f9;
  color: #1a1a2e;
  min-height: 100vh;
  padding: 24px 16px 48px;
}

/* ===== Header ===== */
.app-header {
  max-width: 720px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Project Name ===== */
.project-name-wrap {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: #f0f3ff;
  border: 1.5px solid #c5d0f8;
  border-radius: 10px;
  padding: 5px 12px;
  cursor: text;
  transition: border-color 0.15s, background 0.15s;
  min-width: 0;
}

.project-name-wrap:hover {
  border-color: #4361ee;
  background: #e8edff;
}

.project-name-wrap .pencil-icon {
  font-size: 15px;
  color: #7a8ee8;
  flex-shrink: 0;
  pointer-events: none;
}

#project-name {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #1a1a2e;
  outline: none;
  cursor: text;
  white-space: nowrap;
  overflow: hidden;
  max-width: 240px;
  text-overflow: ellipsis;
  background: transparent;
  border: none;
}

#project-name:focus {
  white-space: normal;
}

.project-name-wrap:focus-within {
  border-color: #4361ee;
  background: #fff;
  box-shadow: 0 0 0 3px #4361ee22;
}

/* ===== Header Right ===== */
.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.data-actions { display: flex; gap: 6px; }

.btn-icon {
  padding: 6px 12px;
  background: #fff;
  border: 1.5px solid #e0e4ef;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  color: #555;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
  white-space: nowrap;
}

.btn-icon:hover { background: #f0f3ff; border-color: #4361ee; color: #4361ee; }

/* ===== Nav ===== */
.app-nav {
  display: flex;
  gap: 4px;
  background: #e8ecf4;
  border-radius: 10px;
  padding: 4px;
}

.nav-btn {
  padding: 6px 16px;
  border: none;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  background: transparent;
  color: #666;
  transition: background 0.15s, color 0.15s;
}

.nav-btn.active {
  background: #fff;
  color: #1a1a2e;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* ===== Main ===== */
.app-main { max-width: 720px; margin: 0 auto; }
.page { display: block; }
.page.hidden { display: none; }

/* ===== Card ===== */
.card {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
}

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: #1a1a2e;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

/* ===== Period Row ===== */
.period-row {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12px; color: #666; font-weight: 500; }

.field input[type="date"],
.field input[type="number"] {
  font-size: 14px;
  padding: 8px 12px;
  border: 1.5px solid #e0e4ef;
  border-radius: 10px;
  color: #1a1a2e;
  background: #f8f9fc;
  outline: none;
  transition: border-color 0.15s;
}

.field input[type="number"] { width: 120px; }
.field input:focus { border-color: #4361ee; background: #fff; }
.period-sep { font-size: 18px; color: #aaa; padding-bottom: 8px; }

/* ===== Stats ===== */
.stats-row,
.task-stats-row,
.chart-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: #f8f9fc;
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-label { font-size: 11px; color: #888; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; }
.stat-value { font-size: 22px; font-weight: 700; color: #1a1a2e; letter-spacing: -0.02em; }
.stat-value.holiday-val { color: #e05c3a; }
.stat-value.work-val    { color: #4361ee; }

/* ===== Legend ===== */
.legend-row,
.chart-legend {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.legend-item { display: flex; align-items: center; gap: 6px; font-size: 12px; color: #666; }
.legend-dot { width: 12px; height: 12px; border-radius: 4px; flex-shrink: 0; }
.dot-range   { background: #dce8fd; border: 1.5px solid #aac7f8; }
.dot-weekend { background: #ebebeb; border: 1.5px solid #ccc; }
.dot-holiday { background: #fde8e2; border: 1.5px solid #f5b8a8; }
.dot-ideal   { background: transparent; border: 1.5px dashed #f5b8a8; }

/* ===== Calendar ===== */
.calendar-wrap {
  border: 1.5px solid #e8ecf4;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 14px;
}

.cal-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }

.cal-nav button {
  background: none;
  border: 1.5px solid #e0e4ef;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  font-size: 18px;
  cursor: pointer;
  color: #444;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s, border-color 0.12s;
}

.cal-nav button:hover { background: #f0f3ff; border-color: #4361ee; color: #4361ee; }
.month-label { font-size: 15px; font-weight: 600; color: #1a1a2e; letter-spacing: -0.01em; }

.cal-dow { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; margin-bottom: 4px; }
.dow { text-align: center; font-size: 11px; font-weight: 600; color: #999; padding: 4px 0; }
.dow.sun { color: #e05c3a; }
.dow.sat { color: #4361ee; }

.cal-days { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; }

.cal-day {
  text-align: center;
  padding: 7px 2px;
  font-size: 13px;
  border-radius: 8px;
  border: 1.5px solid transparent;
  color: #ccc;
  position: relative;
  transition: background 0.1s, color 0.1s;
}

.cal-day.in-range { background: #dce8fd; color: #1a4a9e; cursor: pointer; }
.cal-day.in-range:hover { background: #c4d8fb; }
.cal-day.in-range.sat,
.cal-day.in-range.sun { background: #ebebeb; color: #888; cursor: default; }
.cal-day.holiday { background: #fde8e2 !important; color: #c0392b !important; font-weight: 600; cursor: pointer; }
.cal-day.holiday::after {
  content: '×'; font-size: 9px; position: absolute; top: 1px; right: 4px;
  color: #e05c3a; font-weight: 700;
}
.cal-day.holiday:hover { background: #fad5cc !important; }

/* ===== Task Gen Row ===== */
.task-gen-row { display: flex; align-items: flex-end; gap: 12px; margin-bottom: 20px; }

/* ===== Buttons ===== */
.btn-primary {
  padding: 9px 20px;
  background: #4361ee;
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  white-space: nowrap;
}

.btn-primary:hover  { background: #3451d1; }
.btn-primary:active { transform: scale(0.97); }

.btn-secondary {
  padding: 8px 16px;
  background: #f0f3ff;
  color: #4361ee;
  border: 1.5px solid #c5d0f8;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-secondary:hover { background: #dce8fd; }

.btn-danger {
  padding: 8px 16px;
  background: #fff3f0;
  color: #e05c3a;
  border: 1.5px solid #f5c4b3;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-danger:hover { background: #fde8e2; }

/* ===== Task Table ===== */
.task-table-wrap {
  border: 1.5px solid #e8ecf4;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
  max-height: 400px;
  overflow-y: auto;
}

.task-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.task-table thead { position: sticky; top: 0; z-index: 1; }

.task-table th {
  background: #f4f6f9;
  padding: 10px 12px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1.5px solid #e8ecf4;
}

.task-table td { padding: 8px 12px; border-bottom: 1px solid #f0f3f8; vertical-align: middle; }
.task-table tbody tr:last-child td { border-bottom: none; }
.task-table tbody tr:hover td { background: #fafbff; }
.task-table tbody tr.done-row td { background: #f6fff6; }
.task-table tbody tr.done-row:hover td { background: #edfaed; }

.col-no     { width: 40px; color: #bbb; font-weight: 600; }
.col-name   { min-width: 0; }
.col-done   { width: 52px; text-align: center; }
.col-date   { width: 110px; }
.col-action { width: 36px; text-align: center; }

.task-name-input {
  width: 100%;
  border: none;
  background: transparent;
  font-size: 13px;
  color: #1a1a2e;
  outline: none;
  padding: 2px 4px;
  border-radius: 6px;
  transition: background 0.12s;
}

.task-name-input:focus { background: #f0f3ff; }
.task-name-input.done-text { color: #aaa; text-decoration: line-through; }

.task-date-select {
  font-size: 12px;
  padding: 4px 6px;
  border: 1.5px solid #c5d0f8;
  border-radius: 7px;
  color: #4361ee;
  background: #f0f3ff;
  outline: none;
  width: 100%;
  cursor: pointer;
  transition: border-color 0.12px;
}

.task-date-select:focus { border-color: #4361ee; background: #fff; }
.date-empty { color: #ccc; font-size: 13px; }
.task-checkbox { width: 16px; height: 16px; cursor: pointer; accent-color: #4361ee; }

.btn-row-delete {
  background: none;
  border: none;
  cursor: pointer;
  color: #ccc;
  font-size: 16px;
  padding: 2px 4px;
  border-radius: 4px;
  line-height: 1;
  transition: color 0.12s, background 0.12s;
}

.btn-row-delete:hover { color: #e05c3a; background: #fde8e2; }

.task-empty-row td { padding: 40px 12px; }
.empty-state { display: flex; flex-direction: column; align-items: center; gap: 10px; color: #bbb; }
.empty-icon  { font-size: 32px; }
.empty-state p { font-size: 13px; }
.task-actions { display: flex; gap: 10px; justify-content: space-between; }

/* ===== Chart ===== */
.chart-container { position: relative; width: 100%; margin-bottom: 16px; }

.chart-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.chart-img-actions { display: flex; gap: 8px; flex-shrink: 0; }
.chart-img-actions .btn-secondary,
.chart-img-actions .btn-primary { padding: 7px 14px; font-size: 13px; }
.chart-img-actions button:disabled { opacity: 0.4; cursor: not-allowed; }

/* ===== Toast ===== */
.chart-toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 9999;
  white-space: nowrap;
}

.chart-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.chart-toast.toast-ok    { background: #1a1a2e; color: #fff; }
.chart-toast.toast-error { background: #e05c3a; color: #fff; }

/* ===== Hint ===== */
.hint { font-size: 12px; color: #aaa; line-height: 1.6; }